You posted your help request to the forum for photoshop.com, and online portal site (not a forum for Photoshop CS). I'll move this for you.
Do you have Align with Layer checked?
Or move the gradient on the image while the layer styles dialog is open (probably moving it up) , as maybe the adjustment is such that only the orange is showing.
Does it make a difference if you view the image at actual pixels (100% view)?
If all else fails i'd reset the photoshop preferences and see if that gets things back to normal: